Improvement in sviachiwes for grooving svietal pulleys



2 SheetsrSheet 2.

J. D. ALVORD. MACHINES FOR enoovme METAL PULLEYS. No.180,409.

Patent/ed Aug. 1, 1876.

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153 kg; Attorney I N PETERS, PHOTO UTWOGRAP WASIQNGTON D C JOSEPH D. ALVORD, OF BRIDGEPORT, CONNECTICUT.

IMPROVEMENT IN MACHINE$ FORGROGVING METAL PULLEYS.

Specification forming part of Letters Patent No; 180,409., dated August 1, 1876; applicationfiled June 17, 1876.

- grooves in wheels, pulleys, 8m.

My object is to cut a groove, or series of concentric grooves, in a wheel rotated in suitable manner by means of one or more series of cutters of successively increasing heights or lengths traveling in a path across and at right angles to the axis of rotation of the wheel, tangentially thereto, and in the plane in which the wheel is rotated, and acting upon its periphery, so as gradually to form the groove or grooves by the successively-deepening cuts of the series of cutting-tools, and finish the groove or grooves by a single traverse of the cuttef-frame past the periphery of therotating whee The subject-matter claimed will hereinafter specifically be designated.

In the accompanying drawings, which represent my improvements as embodied in a machine adapted for forming two parallel concentric grooves simultaneously in a wheel or pulley, Figure l is a longitudinal elevation, partly in section Fig. 2, an end elevation. Fig.3is a longitudinal vertical section through the reciprocatingcutter-frame, its support and guideway, and parts connected therewith, on the line 1 1 of Fig. 4, showing one of the series or gangs of cutters in elevation 5 and Fig. 4, a transverse vertical section on the line 2 2 of Fig. 3.

A supporting base or frame, A, of suitable construction, is provided with supports or standards B B, for a shaft or spindle, C, which is mounted in vertically-adjustable housings or boxes D D. The adjustment of the shaft, so as to admit of varying-sized wheels being grooved, is accomplished by screws 61 d, or in other suitable Well-known way. Suitable collars on the spindle prevent its endwise movement in the housings, and band-wheels for rotating the spindle at different speeds are provided. Near one end of the spindle is a chuck or centering-head, E, for securing the wheel F to be grooved upon the spindle. A pin, 0, upon the chuck enters a cavity in the face of the wheel, and a thumb-nut, Gr, screws upon the end of the spindle, or the wheel may be secured to the spindle in any other wellknown way which admits of its ready attachment and removal, and causes it to revolve therewith when secured in place. A guideway and support, H, for a reciprocating carriage or frame, I, for the cutters, rests upon the frame A. In this instance two gangs or series 'of cutters, J J, are mounted in the frame I.

The cutters J, as shown, are of different lengths from those J, each one of the series J being shorter than the corresponding cutter of the series J, so as to form concentric grooves being the shortest, and the final one the long-- est, the cutters of each series successively increasingin length. The cutters are secured in aholder or socket, K, provided with a separate seat or groove for either series. The two grooves for the cutters are divided by a partition, la, against which the cutters are pressed, each by its respective set-screw L, to prevent sidewise movement, and prevent aecidental vertical displacement. Sliding wedges M, one for each cutter, serve to adjust the cutters, independently of each other, in the direction of their lengths, to compensate for wear,admit of deep or shallow grooves being formed, allow one or more cutters to be removed and replaced, and enable cutters of different lengths to be used in the same position. The cutters are prevented from moving in the direction of the length of their grooves or seats by contact with each other, or by the use of intervening strips or wedges, when necessary. Different holders K are employed to suit the work being done, the holder being detaehably s cured to the frame I by screws. \Nhen a single groove is to be cut the cutters may be placed centrally in their holder, and set-screws used at both sides, if preferred.

The frame or carriage I moves, as usual, in dovetail grooves in the guide and support H. A strip, N, and set-screw 0 provide for wear between the carriage and ways being compensated.

Suitable feeding mechanism, such, for instance, as a screw, P, crank Q, and female screw R, serves to traverse the carriage carryin g the cutters up to and away from the work.

In operation it will be seen that as the cutters are moved against the revolving wheel they come in contact successively with its periphery, and gradually cut the groove, little by little, until the final and finishing cutter has completed its groove. The wheel is then removed, the carriage retracted, and the operation repeated on another wheel.

I claim as of my own invention- 1. The combination, substantially as hereinbefore set forth, of a traversing carriage and a series of cutters of gradually-increasing lengths moving tangentially across the axis of rotation of the wheel to be grooved.

2. lhe combination of the traversing cutter carriage or frame, the holder or socket for the cutters, and a series ofindependently-adjustable cutters of successively increasing lengths secured in the socket, substantially as and for the purposes specified.

3. The combination, substantially as hereinbefore set forth, of the reciprocatingcarriage, the holder, and the parallel gangs of independently-adjustable cutters of successivelyincreasiug lengths secured in the holder.

In testimony whereof I have hereunto subscribed my name. 4

JOSEPH D. ALVOBD.

Witnesses:

JAMES ALFORD HoUsE, A. R. Lacy. 4 

